西南交大大学英语1-5离线作业
大学英语离线作业1
How to Keep Healthy
With the development of people's living standard, huge amounts of people have become to focus on balancing diet and keep fit.In my opinion, you can be a healthy person just follow the advices as below:
Firstly, we need more vegetable and fruits as well as execrising and having the enough time to sleep.
On the contrary, we should also pay attention to some backdraws, such as excessed fat and sugar. Moreover, much coffee is also harmful for us and overwork is a bad hehavior.
In conclusion, after following the six important rules, you will to be given a sound body and high-level mind totally.
大学英语离线作业2
My Favorite Season
My favourite season is summer. I like summer because it's a season of enthusiasm.
In summer, everything turns energetic. We are the most efficient to do things at this period of time. What's more, we are able to do a lot of sports and activities in summer. The
trees and grass become very green and beautiful and I like that colour for what it represents. It is a symbol of hope. And with hope, we are motivated and creative. So summer is also the season of hope. We are able to take cold drinks in summer which is my favourite as well.
In a word, I like summer, because it makes me energetic and gives me hope.
大学英语离线作业3
Private Cars
Nowadays more and more families own private cars. Private cars, as the product of modem civilization, have been playing a vital role in people's daily activities. First, private cars are a convenient means of transportation. You can go wherever you like. Secondly, there is no doubt that private cars will have a great impact on the economic growth. The rapid car industry growth will contribute much to keeping the country's economy growing at a higher rate in the near futrue.
But every coin has two sides. The development of the private cars will bring about a series of problems. For example, the polluted air given off by cars will do great harm to our health, too many private cars will lead to traffic jams and a great deal
of energy will be wasted and so on.
So I think we should take advantages of private cars and make them serve us better. Meantime we hope that satisfactory solutions to these negative problems will be found soon.
大学英语离线作业4
A City to Remember
Last year,my parents took me to Beijing. On the first day, we went to the Great Wall. The Great Wall is very long and old. It has millions of bricks. Each brick is very big and heavy. Lots of people from different countries like climbing the Great Wall. We felt very tired when we climbed to the top of the Great Wall.
The following days, we went to the Palace Museum,the Summer Palace, Tian Tan, North Lake and Xiang Hill. I now know more about the history of China. I also like modern Beijing.
Later, I went back with my parents by train. I really enjoyed the trip to Beijing.
大学英语离线作业5
Online Shopping
Nowadays with the ever rapid development and increasingpopularity of the information technology
shopping on the internet has been a fashion especially among the youngsters.
Online shopping has made our daily life more convenient and comfortable. For example shopping on the internet can save students a great deal of time on the way between home and store so they would be able to concentrate more time and energy on theiracademic work. The internet has shorten the distance between manufacturers and consumers and thus we can even buy goods in other countries .On the other hand lack of the face to face deal makes online shopping less reliable and trustworthy. What’ s more the delivery will incr ease the risk of items’ damage.
In my opinion shopping on the internet is a irreversible trend. More and more people will be accustomed to it. It will be much more popular in the near future. And at the same time we should take some measures to make it perfect.
西南交大交通运输系统分析离线作业
交通运输系统分析第一次作业 三、主观题(共12道小题) 41.开放系统 答：系统与外界环境之间有物质、能量、信息交换的系统称为开放系统． 42.请举出一个系统的实例，并分析其目的、要素集、关系、结构和环境． 答：（主观题，自行举例即可） 43.系统的目标集中若出现相互矛盾的情况，应当怎样处理？请举例说明． 答：分目标之间可能是矛盾的，因此采用某种形式的折衷是必要的，即在矛盾的分目标之间寻求平衡．具体的做法是通过计算每个分目标对总目标的贡献来确定最佳的妥协． （自行举例既可） 44.切克兰德软系统方法论的步骤是什么？ 答： （1）系统现状说明 通过调查分析，对现存的不良结构系统的现状进行说明． （2）弄清关联因素 初步弄清与现状有关的各种因素及其相互关系． （3）建立概念模型 在不能建立数学模型的情况下，用结构模型或语言模型来描述系统的现状．（4）改善概念模型 随着分析的不断深入和“学习”的加深，进一步用更合适的模型或方法改进上述概念模型． （5）比较 将概念模型与现状进行比较，找出符合决策者意图而且可行的改革途径或方案．（6）实施 实施所提出的改革方案． 45.交通运输系统的作业特征是什么？ 答： （1）交通运输系统是一个连续过程系统； （2）交通运输系统生产的多环节、多功能、超区域的特点； （3）交通运输系统生产具有网络性特点； （4）交通运输系统是一个动态系统． 46.怎样理解交通运输系统的网络性？ 答：交通运输生产不仅仅是列车、车辆在轨道、道路上移动，而且在交通运输网（包括铁路网、公路网、水运网、航空网等）上运动．良好的交通运输系统首先要有合理的布局与结构，要建设成与内部、外部协调的交通运输网．在具有科学
大学英语三离线作业3
离线作业试卷列表3 一、单选 1.第一部分：交际用语（共5小题；每小题3分，满分15分）- What would you like to drink?- ___D____ . 分值：3 A. Anything wrong B. Very good C. Well done D. orange juice, please 2.第一部分：交际用语（共5小题；每小题3分，满分15分）- I'm engaged.- ___A____ on your engageme nt. 分值：3 A. Congratulations B. Pleasure C. Welcome D. Cheers 3.第四部分：完形填空（共10小题；每小题1分，满分10分）30 分值：1 A. for B. with C. over D. in 4.第四部分：完形填空（共10小题；每小题1分，满分10分）29 分值：1 A. to wait B. waiting C. waited D. wait 5.第四部分：完形填空（共10小题；每小题1分，满分10分）28 分值：1 A. on B. in C. at D. by 6.第一部分：交际用语（共5小题；每小题3分，满分15分）- I'd like to make a reservation for two days. My name is Li Ming.- ___A____ 分值：3 A. Single or double room? B. You are too late for the room. C. We don't have any room. D. Our hotel is very expensive. 7.第一部分：交际用语（共5小题；每小题3分，满分15分）- Hello, may I speak to John? -_____B____ _ 分值：3
南开大学《大学英语(二)》离线答案
一、单选题（共15小题，每题2分，共计30分）从A、B、C三个选项中选出一个能填入空白处的最佳选项，请答案填写在“客观题答题纸”上，否则成绩无效。 1. They failed to pass the exam last time, I regretted ________. A. being unable to help B. to be not able to help C. being not able to help D. not be able to help 2. She was busy last weekend. Otherwise, she _______ to the party. A. would have gone B. would go C. had gone D. would be gone 3. The book, ________ cover is broken, is not mine. A. who B. whose C. that D. which 4. I would have told him the answer if it ________ possible. A. had been B. were C. was D. have been 5. If the bridge is built, the local people will greatly benefit ________ it. A. against B. for C. from D. in 6. He entered the classroom cheerfully, ________ a book in his hand. A. to carry B. carrying C. carry D. carried 7. Some scientists say it is essential that mankind ________ the amount of air pollution in big cities A. reduce B. be reduced C. reduced D. will reduce 8. Many patients insist on having watches with them in hospital, _____ they have no schedules to keep. A. even though B. for C. as if D. since 9. I have trouble________ their meaning. A. understanding B. to understand C. understood D. be understood 10. She should spend _____ one hour practicing spoken English every day if she hopes to pass the College Spoken English Test in November. A. at last B. at best C. at most D. at least 11. Many college students like to chat on the Internet. They think talking with friends on the Internet is _____ casual and exciting ______ face to face. A. not only----but also B. less------than C. more-----than D. neither------nor 12. Although Tom has many personal problems, he _______ present every day since the first day of class. A. has been B. had been C. is D. was 13. You shouldn’t have called me while I was giving my class. You ______ me after my 2014年2月期末《大学英语（二）》共6大页-第1页
西南交大-大学英语3-离线作业
2013—2014学年第一学期 离线作业 科目：大学英语III 姓名：李冬军 学号： 1524582 专业：车辆工程2015-26班（专本） 西南交通大学网络教育学院 直属学习中心
大学英语III第1次作业主观题 Directions: For this part, you are allowed 30 minutes to write a composition on the topic “How to Keep Healthy”. You should write no less than 80 words. What is the most important thing in the world? I think it is health. You can take away our money, house, car, or even our clothes and we can survive. But if our health was taken away, we would surely die. That is why we always try to eat in a healthy way and exercise regularly. What＇s more, I think friends are an important part of one＇s health. Many studies show that people with a wide range of social contacts get sick less than those who don＇t. I always feel better when I am with friends than when I am alone. When I am with my friends, I always laugh. Laughing is also an important part of health. I like to laugh with my friends. By eating properly and exercising regularly, I can keep my body at a proper weight and keep healthy. By spending time with my friends, I can keep my mind as well as my body happy. These things sound easy to do, but not many people can manage them. I think a strong will is necessary if we want to keep healthy.
大学物理(西南交大)作业参考答案5
NO.5 电势、导体与※电介质中的静电场 （参考答案） 班级： 学号： 姓名： 成绩： 一 选择题 1．真空中一半径为R 的球面均匀带电Q ，在球心O 处有一带电量为q 的点电荷，如图所示，设无穷远处为电势零点，则在球内离球心O 距离为r 的P 点处的电势为： （A ）r q 04πε； （B ）(041 R Q r q +πε； （C ）r Q q 04πε+； （D ）)(0 41 R q Q r q -+ πε； 参考：电势叠加原理。 [ B ] 2．在带电量为-Q 的点电荷A 的静电场中，将另一 带电量为q 的点电荷B 从a 点移动到b ，a 、b 两点距离点电荷A 的距离分别为r 1和r 2，如图，则移动过程中电场力做功为： （A ）(2 101 1Q --； （B ）(2 101 14r r qQ -πε； （C ） )(2 1 114r r qQ --πε； （D ） ) (4120r r qQ --πε。 参考：电场力做功＝势能的减小量。A=W a -W b ＝q(U a -U b ) 。 [ C ] 3．某电场的电力线分布情况如图所示，一负电荷从M 点移到N 点，有人根据这个图做出以下几点结论，其中哪点是正确的？ （A ）电场强度E M ＜E N ； （B ）电势U M ＜U N ； （C ）电势能W M ＜W N ； （D ）电场力的功A ＞0。 [ C ] 4．一个未带电的空腔导体球壳内半径为R ，在腔内离球心距离为d （d ＜R ）处，固定一电量为+q 的点电荷，用导线把球壳接地后，再把地线撤去，选无穷远处为电势零点，则球心O 处的点势为： （A ）0； （B ）d q 4πε； （C ）-R q 04πε； （D ）)(1 1 40 R d q - πε。 参考：如图，先用高斯定理可知导体内表面电荷为-q ，外表面无电荷（可分析）。虽然内表面电荷分布不均，但到O 点的距离相同，故由电势叠加原理可得。 [ D ] ※5．在半径为R 的球的介质球心处有电荷+Q ，在球面上均匀分布电荷-Q ，则在球内外处的电势分别为： （A ）内r Q πε4+，外r Q 04πε-； （B ）内r Q πε4+，0； 参考：电势叠加原理。注：原题中ε为ε0 （C ）R Q r Q πεπε44-+内 ，0； （D ）0，0 。 [ C ] r 2 (-Q)A b r 1 B a （q ）
南开2015年3月考试大学英语(二)离线作业答案
南开大学现代远程教育学院考试卷 2014-2015年度秋季学期期末(2015.3) 大学英语（二） 一、单选题（共15小题，每题2分，共计30分）从A、B、C三个选项中选出一个能填入空白处的最佳选项，请答案填写在“客观题答题纸”上，否则成绩无效。 1. This kind of glasses manufactured by experienced craftsmen __D__ comfortably. A. is worn B. wears C. wearing D. are worn 2. The lawyer advised him to drop the __C___, since he stands little chance to win. A. event B. incident C. case D. affair 3. He always shows haughty ___C___ toward his colleagues. A. behavior B. action C. conduct D. benefit 4. ___A___ at the station when it got dark, the passengers found there were no buses ________ home. A. Arriving, to take B. Arriving, to ride C. Having arrived, riding on D. Having been arrived, to go on 5. The boy spent as much time watching TV as he ___D__ studying. A. does B. had C. was D. did 6. The goals __B__ he had fought all his life no longer seemed important to him. A. after which B. for which C. with which D. at which 7. It ___C___ that the boss was angry again. A. appeared B. looked C. seems D. appears 8. When does the new law come into ___A___? A. action B. act C. activity D. operation 9. Young as he was, he showed his capability of __A___ various problems. A. dealing with B. dealing up C. dealing in D. dealing out 10. We ___C___ our journey after a short rest. A. presumed B. consumed C. resumed D. assumed 11. ___D____ she first heard of the man referred to as a specialist. A. That was from Stephen B. It was Stephen whom C. While comparing D. It was Stephen that 12. They tried to ___D__ the old man whose son died in an aircraft. A. thrill B. tease C. console D. encourage 13. I should like to rent a house, modern, comfortable and __B__ in a quiet neighborhood. A. all in all B. above all C. after all D. over all
西南交大隧道工程在线离线作业
西南交大隧道工程在线 离线作业 Document serial number【KKGB-LBS98YT-BS8CB-BSUT-BST108】
西南交大网络教育《隧道工程》在线作业本次作业是本门课程本学期的第1次作业，注释如下： 一、单项选择题(只有一个选项正确，共7道小题) 1. 随着隧道的设计与计算理论的发展，隧道支护系统承载能力及安全度评定的方法也随着发展而不断完善，现行的方法有（）①经验设计和工程类比方法②概率极限状态可靠度设计③允许应力法④破损阶段法 (A)①②③④ (B)②③④ (C)①② (D)①③④ 正确答案：B 解答参考： 2. 地下结构围岩（岩体+土体）的哪项工程性质对围岩的稳定性影响最大（） (A)物理性质 (B)水理性质 (C)力学性质 (D)化学性质 正确答案：C 解答参考： 3. 下列关于自重应力场变化规律的叙述，错误的是（） (A)自重应力随深度线性增加 (B)由自重应力引起的水平应力可能大于自重应力 (C)地质构造形态会改变了自重应力场的状态 (D)深度对初始应力状态有影响 正确答案：B 解答参考： 4.
在如图所示的地质构造中修建隧道，位置选择最好的是（） (A)a和c位置 (B)b位置 (C)a位置 (D)c位置 正确答案：C 解答参考： 5. 隧道因考虑排水的需要，应限制最小坡度，《铁路隧道设计规范》规定，隧道内线路不得设置平坡，最小的允许坡度不宜小于（） (A)3% (B)2‰ (C)2% (D)3‰ 正确答案：D 解答参考： 6. 关于铁路隧道单洞双线和双洞单线的比较，下列说法正确的是（） (A)单洞双线的投资较高。 (B)双洞单线的空气动力学和环境影响较小。 (C)单洞双线可以利用活塞风，而双洞单线难以利用活塞风。 (D)单洞双线的单洞断面面积较大，软弱围岩中易塌方，容易变形，风险大。 正确答案：D 解答参考： 7. 端墙式洞门适用于下列哪种情况（） (A)洞当洞口石质坚硬稳定，且地形陡峻无排水要求时。 (B)洞口地质较差（Ⅳ级及以上），山体纵向推力较大时。 (C)适用于地形开阔，石质较稳定的地区。
房屋建筑学(西南交大)离线作业
21.墙体设计要求有哪些？ 22.提高墙体的热阻的措施有哪些 23.墙体的隔热措施有哪些 24.实体砖墙的组砌方式主要有哪几种 25.普通粘土砖墙的砖模尺寸与建筑模数是否一致？如何协调二者关系 26.勒脚的作用是什么？常用的做法有哪几种 27.墙身防潮层的作用是什么？水平防潮层的位置如何确定？什么请款下须设垂直发防潮层 28.墙身防潮层的作用是什么？水平防潮层的位置如何确定？什么请款下须设垂直发防潮层
29.窗洞口上部过梁的常用做法有哪几种，各自的适用范围如何 30.砖砌平拱过梁的构造要点是什么 31.圈梁的作用有哪些？设置原则主要有哪些 32.构造柱的作用及加设原则是什么？ 33.构造柱的构造要点有哪些 ? 34.简述墙体三种变形缝的异同 35.简述 1/2 砖隔墙构造要点。 36.简述加气混凝土砌块隔墙构造要点 37.墙面装修的作用是什么 ? 38.什么是抹灰类墙面装修？有哪些构造层次？简单介绍各构造层次的作用与做法
39.什么是贴面类装修？常见贴面类装修有哪些？ 40.什么是涂料类墙面装修？涂料施涂方法有哪些？ 17.楼梯的作用及设计要求有哪些 18.楼梯主要由哪些部分组成？各部分的作用和要求是什么？ 19.楼梯坡度的表达方式有那些？ 20.当楼梯底层中间平台下做通道而平台净高不满足要求时，常采取哪些办法解决？ 21.现浇钢筋混凝土楼梯有哪几种结构形式？各有何特点 22.预制踏步有哪几种断面形式和支承方式？
23.栏杆扶手在平行楼梯的平台转弯处如何处理？ 24.室外台阶的构造要求是什么？通常有哪些做法。 25.电梯井道的构造要求有哪些？ 26.简述楼梯的设计步骤。 27.< 影响基础埋置深度的因素有哪些？ 28.基础按构造形式不同分为哪几种？各自的适用范围如何？ 29.确定地下室防潮或防水的依据是什么？ 30.地下室卷材外防水的层数是如何确定的？ 21. 现浇钢筋混凝土楼板的特点和适用范围是什么
南开17年9月考试《大学英语(一)》考核要求离线作业
南开大学现代远程教育学院考试卷 大学英语（一） PartⅠ答题纸：请将1－20题答案填写在如下表格中，否则成绩无效。 PartⅡ答题纸：请将21－45题答案填写在如下表格中，否则成绩无效。
PartⅢ答题纸：请将46－50题答案填写在如下表格中，否则成绩无效。 PartⅣ答题纸：请将（1）-（6）题答案填写在如下表格中，否则成绩无效。
Model Test One Part ⅠVocabulary and Structure Directions: This part is to test your ability to use words and phrases correctly to construct meaningful and grammatically correct sentences. It consists of 2 sections. Section A Directions: There are 10 incomplete statements here. You are required to complete each statement by choosing the appropriate answer from the 4 choices marked A), B), C) and D). You should mark the corresponding letter on the Answer Sheet with a single line through the center. (本题共10个小题，每题1分，共10分) 1. We will have to pay them a large ________ of money for their service． A. size B. set C. amount D. series 2. I'd appreciate it if you could tell me how_______the machine. A. operate B. to operate C. operating D. operated 3. I'm sorry to tell you that the materials you wanted are_______． A. taken off B. put up C. sold out D. got off 4. It is obvious that these small businesses are _______need of technical support． A. in B. on C. with D. to 5. _______I am concerned，it is important to get a job first． A. As long as B. As well as C. As soon as D. As far as 6. Some companies might not let you rent a car _______ you have a credit card．
第一学期西南交大理论力学C第1次作业答案
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大学英语三离线作业答 案 Document serial number【NL89WT-NY98YT-NC8CB-NNUUT-NUT108】
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